EP1184113B1 - Clamp apparatus for a hollow shank - Google Patents
Clamp apparatus for a hollow shank Download PDFInfo
- Publication number
- EP1184113B1 EP1184113B1 EP01112512A EP01112512A EP1184113B1 EP 1184113 B1 EP1184113 B1 EP 1184113B1 EP 01112512 A EP01112512 A EP 01112512A EP 01112512 A EP01112512 A EP 01112512A EP 1184113 B1 EP1184113 B1 EP 1184113B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamping
- claw
- head
- clamping device
- hollow shank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 46
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
- B23B31/26—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle
- B23B31/261—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle clamping the end of the toolholder shank
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/103—Retention by pivotal elements, e.g. catches, pawls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/33—Elastomers, e.g. rubber
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/10—Expanding
- Y10T279/1004—Collet type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/309352—Cutter spindle or spindle support
- Y10T409/309408—Cutter spindle or spindle support with cutter holder
- Y10T409/309464—Cutter spindle or spindle support with cutter holder and draw bar
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/30952—Milling with cutter holder
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T82/00—Turning
- Y10T82/25—Lathe
- Y10T82/2585—Tool rest
- Y10T82/2589—Quick release tool or holder clamp
Definitions
- the invention relates to a clamping device for releasable Clutch of a hollow shaft with a Hohlschaftability having tool, workpiece or Like.
- Such a clamping device is from the DE 41 38 974 A1 discloses in which the clamping jaws by a mediated via a tie rod axial adjustment of the clamping head from a position in which they except Engage with the hollow shaft are, in one position be adjusted, in which the clamping jaws engaged with the hollow shaft, which usually by means of a Charging device of the tensioning device is supplied.
- the elongated, only one-sided on the work spindle mounted jaws have a game that the free end not exactly radial movements with allows lateral movement components, so that a exactly even distribution of the clamping jaws on their free end is not given in the circumferential direction. This leads to an imbalance, which in conventional Machine tools is unproblematic, but at modern, with speeds up to 40,000 revolutions per Minute working machine tools adversely affects.
- the invention is therefore based on the object, a Clamping device of the type mentioned so form, that a resulting during the clamping process Imbalance is avoided.
- the invention offers the advantage that the first time a lateral guidance of the clamping jaws is provided with a great length of leadership that is close to the free End of the jaws extends and so lateral Evasive movements of the clamping jaws with security prevented.
- the assignment of these as guide surfaces acting wings to the chuck and not to Work spindle, on which the clamping jaws already one-sided stored, allows easy production and does not limit the length of the work spindle usable hollow shaft.
- each clamping claw at the end of which the inclined surface facing away from the claw head one in an in Circumferential direction of the work spindle extending annular groove engaging claw foot when on the chuck to form a wedge gear one with the claw head each clamping claw cooperating conical surface and the Releasing the tension associated with the claw foot Footprint is formed, and when the wings between the conical surface and the footprint are arranged.
- These Choice of wing arrangement ensures that for operating the clamping jaws when clamping and Solve required functional surfaces due to not axial with respect to the wings have to be modified.
- a preferred embodiment of the invention is characterized characterized in that the clamping jaws at their claw feet connected by a spring member to a segment collet are.
- the connection of the clamping jaws to a Segment collets simplify handling during the Assembly and when operating the clamping device, there for mounting the clamping jaws of the segment collet merely compressed under tension of the spring member and then in the circumferential direction of the Work spindle extending annular groove can be used can, in which the segment collet by the Spring element itself secures.
- the individual clamping jaws of Segment collets can due to the spring member Align themselves with each other, although with a lateral play of the clamping feet is connected. This is but in terms of an imbalance uncritical, because due the wing with its large guide lengths a in Circumferential uniform distribution of the clamping jaws is ensured.
- the spring member formed by a rubber-elastic ring that is in one at the claw foot in the circumferential direction extending groove is held in the circumferential direction in the intervenes between the clamping jaws existing gaps and is connected to the radial surfaces of the claw feet.
- a clamping device is shown to be releasable Coupling a hollow shaft 1 with a Hollow shaft receiving 2 having workpiece 3 with the Work spindle 4 of a machine tool.
- a Hollow shaft receiving 2 having workpiece 3 with the Work spindle 4 of a machine tool.
- flat surfaces. 5 formed, namely radially directed planar surfaces. 5 and due to the design of the hollow shaft 1 as Hollow shaft taper inclined to the longitudinal axis 6 extending Planar surfaces 5.
- To the hollow shaft 1 for safe clamping to press against these plane surfaces 5 are in the Hollow shaft mount 2 inclined clamping bevels 7 formed at which clamping jaws 8 with corresponding inclined inclined surfaces 9 are brought to bear can.
- the clamping jaws 8 are in a circumferential direction the work spindle 4 extending annular groove 10 and stored extend substantially in the axial direction parallel to the longitudinal axis 6 of the tensioning device, wherein the Clamping 8 in the annular groove 10 with a claw foot 11th engage and at the opposite free end one Have claw head 12, on which the inclined surfaces. 9 are formed.
- an axially displaceable clamping head 13th led to the formation of a wedge gear with the Claw head a cooperating with this conical surface 14th has as well as to release the voltage on the Claw foot 11 arranged footprint 15, at the one Annular collar 16 formed with axially constant diameter is, with a formed on the claw foot 11 bead 17th interacts.
- the in the work spindle 4 for receiving the Claw foot 11 trained annular groove 10 has a Groove wall 23, which is up to half the height of Nutgrund extends at right angles and from this height with an inclination angle of 10 ° to the claw head 12, so that this for insertion of the hollow shaft 1 a has sufficient Fanghub.
- the clamping device can in principle with any even or odd number of Clamping 8 are realized. As favorable have Embodiments with six or seven clamping claws 8 pointed out, which are shown in Figures 8 and 9.
Abstract
Description
Die Erfindung betrifft eine Spannvorrichtung zur lösbaren Kupplung eines einen Hohlschaft mit einer Hohlschaftaufnahme aufweisenden Werkzeugs, Werkstücks oder dergl. mit der Arbeitsspindel einer Werkzeugmaschine, wobei der Hohlschaft in der Hohlschaftaufnahme geneigt verlaufende Spannschrägen aufweist, an denen zur Erzeugung einer Anpreßkraft zwischen dem Hohlschaft und der Arbeitsspindel durch einen axial verschieblichen, in der Arbeitsspindel geführten Spannkopf betätigbare, an der Arbeitsspindel gelagerte Spannklauen mit korrespondierend geneigten Schrägflächen zur Anlage bringbar sind.The invention relates to a clamping device for releasable Clutch of a hollow shaft with a Hohlschaftaufnahme having tool, workpiece or Like. With the work spindle of a machine tool, wherein the hollow shaft inclined in the hollow shaft receptacle has running chamfers at which to produce a contact pressure between the hollow shaft and the Work spindle by an axially displaceable, in the Work spindle guided clamping head actuated, at the Work spindle mounted clamping jaws with corresponding inclined inclined surfaces can be brought to bear.
Eine derartige Spannvorrichtung ist aus der DE 41 38 974 A1 bekannt, bei der die Spannklauen durch eine über eine Zugstange vermittelte axiale Verstellung des Spannkopfes aus einer Position, in der sie außer Eingriff mit dem Hohlschaft sind, in eine Position verstellt werden, in der die Spannklauen in Eingriff mit dem Hohlschaft sind, der üblicherweise mittels einer Ladeeinrichtung der Spannvorrichtung zugeführt wird. Die langerstreckten, nur einseitig an der Arbeitsspindel gelagerten Spannklauen weisen ein Spiel auf, das dem freien Ende nicht exakt radial erfolgende Bewegungen mit seitlichen Bewegungskomponenten ermöglicht, so daß eine exakt gleichmäßige Verteilung der Spannklauen an ihrem freien Ende in Umfangsrichtung nicht gegeben ist. Dies führt zu einer Unwucht, die bei konventionellen Werkzeugmaschinen unproblematisch ist, sich aber bei modernen, mit Drehzahlen bis zu 40.000 Umdrehungen pro Minute arbeitenden Werkzeugmaschinen nachteilig auswirkt.Such a clamping device is from the DE 41 38 974 A1 discloses in which the clamping jaws by a mediated via a tie rod axial adjustment of the clamping head from a position in which they except Engage with the hollow shaft are, in one position be adjusted, in which the clamping jaws engaged with the hollow shaft, which usually by means of a Charging device of the tensioning device is supplied. The elongated, only one-sided on the work spindle mounted jaws have a game that the free end not exactly radial movements with allows lateral movement components, so that a exactly even distribution of the clamping jaws on their free end is not given in the circumferential direction. This leads to an imbalance, which in conventional Machine tools is unproblematic, but at modern, with speeds up to 40,000 revolutions per Minute working machine tools adversely affects.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Spannvorrichtung der eingangs genannten Art so auszubilden, daß eine sich beim Spannvorgang ergebende Unwucht vermieden wird.The invention is therefore based on the object, a Clamping device of the type mentioned so form, that a resulting during the clamping process Imbalance is avoided.
Diese Aufgabe wird nach der Erfindung bei einer Spannvorrichtung der eingangs genannten Art dadurch gelöst, daß an dem Spannkopf zur Führung der Spannklauen radial abstehende Flügel ausgebildet sind.This object is achieved according to the invention in a Clamping device of the type mentioned by solved that on the chuck to guide the clamping jaws are formed radially projecting wings.
Die Erfindung bietet den Vorteil, daß erstmals eine seitliche Führung der Spannklauen bereitgestellt wird mit einer großen Führungslänge, die sich bis nahe des freien Endes der Spannklauen erstreckt und so seitliche Ausweichbewegungen der Spannklauen mit Sicherheit verhindert. Die Zuordnung dieser als Führungsflächen fungierenden Flügel zum Spannkopf und nicht zur Arbeitsspindel, an der die Spannklauen bereits einseitig gelagert sind, ermöglicht eine einfache Fertigung und beschränkt nicht die Länge des in die Arbeitsspindel einsetzbaren Hohlschaftes.The invention offers the advantage that the first time a lateral guidance of the clamping jaws is provided with a great length of leadership that is close to the free End of the jaws extends and so lateral Evasive movements of the clamping jaws with security prevented. The assignment of these as guide surfaces acting wings to the chuck and not to Work spindle, on which the clamping jaws already one-sided stored, allows easy production and does not limit the length of the work spindle usable hollow shaft.
Als vorteilhaft hat sich weiterhin herausgestellt, wenn jede Spannklaue an dem Ende, das von dem die Schrägfläche aufweisenden Klauenkopf abgewandt ist, einen in eine in Umfangsrichtung der Arbeitsspindel verlaufende Ringnut eingreifenden Klauenfuß aufweist, wenn an dem Spannkopf zur Ausbildung eines Keilgetriebes eine mit dem Klauenkopf jeder Spannklaue zusammenwirkende Kegelfläche und zum Lösen der Spannung eine dem Klauenfuß zugeordnete Stellfläche ausgebildet ist, und wenn die Flügel zwischen der Kegelfläche und der Stellfläche angeordnet sind. Diese Wahl hinsichtlich der Anordnung der Flügel stellt sicher, daß die zur Betätigung der Spannklauen beim Spannen und Lösen erforderlichen Funktionsflächen aufgrund der gegenüber den Flügeln erfolgenden axialen Staffelung nicht modifiziert werden müssen.As beneficial has also been found, if each clamping claw at the end of which the inclined surface facing away from the claw head, one in an in Circumferential direction of the work spindle extending annular groove engaging claw foot when on the chuck to form a wedge gear one with the claw head each clamping claw cooperating conical surface and the Releasing the tension associated with the claw foot Footprint is formed, and when the wings between the conical surface and the footprint are arranged. These Choice of wing arrangement ensures that for operating the clamping jaws when clamping and Solve required functional surfaces due to not axial with respect to the wings have to be modified.
Als günstig hat sich erwiesen, wenn sich die Längenerstreckung der Flügel in axialer Richtung des Spannkopfes radial von innen nach außen vergrößert. Diese Gestaltung kombiniert die Vorteile einer möglichst großen Führungslänge der Flügel mit den Vorteilen einer einfachen Fertigung, da der Spannkopf über den größten Teil seiner Längenerstreckung konventionell drehend gefertigt werden kann und nur im Bereich zwischen den Flügeln eine Bearbeitung durch Fräsen vorgenommen werden muß. As favorable has been proven when the Length extension of the wings in the axial direction of the Clamping head radially enlarged from inside to outside. These Design combines the advantages of the largest possible Guide length of the wings with the advantages of a simple Manufacturing, since the chuck over most of his Length extension conventionally rotating manufactured can and only in the area between the wings one Machining must be made by milling.
Eine bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, daß die Spannklauen an ihren Klauenfüßen durch ein Federglied zu einer Segmentspannzange verbunden sind. Die Verbindung der Spannklauen zu einer Segmentspannzange vereinfacht die Handhabung bei der Montage und bei der Betätigung der Spannvorrichtung, da für die Montage die Spannklauen der Segmentspannzange lediglich unter Spannung des Federgliedes zusammengedrückt werden müssen und dann in die in Umfangsrichtung der Arbeitsspindel verlaufende Ringnut eingesetzt werden können, in der die Segmentspannzange sich durch das Federglied selber sichert. Die einzelnen Spannklauen der Segmentspannzange können sich aufgrund des Federgliedes selber untereinander ausrichten, was zwar auch mit einem seitlichen Spiel der Spannfüße verbunden ist. Dies ist aber hinsichtlich einer Unwucht unkritisch, da aufgrund der Flügel mit ihren großen Führungslängen eine in Umfangsrichtung gleichmäßige Verteilung der Spannklauen sichergestellt ist.A preferred embodiment of the invention is characterized characterized in that the clamping jaws at their claw feet connected by a spring member to a segment collet are. The connection of the clamping jaws to a Segment collets simplify handling during the Assembly and when operating the clamping device, there for mounting the clamping jaws of the segment collet merely compressed under tension of the spring member and then in the circumferential direction of the Work spindle extending annular groove can be used can, in which the segment collet by the Spring element itself secures. The individual clamping jaws of Segment collets can due to the spring member Align themselves with each other, although with a lateral play of the clamping feet is connected. This is but in terms of an imbalance uncritical, because due the wing with its large guide lengths a in Circumferential uniform distribution of the clamping jaws is ensured.
Aus fertigungstechnischen Gründen ist es bevorzugt, wenn das Federglied durch einen gummielastischen Ring gebildet ist, der in einer am Klauenfuß in Umfangsrichtung verlaufenden Nut gehalten ist, in Umfangsrichtung in die zwischen den Spannklauen bestehenden Lücken eingreift und mit den Radialflächen der Klauenfüße verbunden ist.For manufacturing reasons, it is preferred if the spring member formed by a rubber-elastic ring that is in one at the claw foot in the circumferential direction extending groove is held in the circumferential direction in the intervenes between the clamping jaws existing gaps and is connected to the radial surfaces of the claw feet.
Weiterhin ist vorgesehen, daß an dem Klauenfuß ein zum Spannkopf weisender Wulst ausgebildet ist zur Zusammenwirkung mit einem an der Stellfläche des Spannkopfes ausgebildeten Ringbund mit in axialer Richtung konstantem Durchmesser. Dieser Ringbund wird genutzt, um die Spannklauen mit ihrem Klauenfuß in der Nut der Arbeitsspindel so zu verschwenken, daß der Klauenkopf außer Eingriff mit den Spannschrägen des Hohlschaftes ist, so daß der Hohlschaft entweder von der Arbeitsspindel entfernt oder in diese eingesetzt werden kann. Der Ringbund sichert die dazu erforderliche Lage der Spannklauen, wobei der in axialer Richtung gegebene konstante Durchmesser des Ringbundes diese Stellung der Spannklauen für den Bereich der axialen Länge des Ringbundes unabhängig von der axialen Stellung des Spannkopfes macht.It is further provided that on the claw foot for Tensioning head facing bead is designed for Interaction with a on the footprint of Clamping head trained annular collar with in the axial direction constant diameter. This ring collar is used to the jaws with their claw foot in the groove of Work spindle to pivot so that the claw head is out of engagement with the clamping slopes of the hollow shaft, so that the hollow shaft either from the work spindle can be removed or used in this. Of the Ringbund ensures the required position of the Clamping jaws, wherein the given in the axial direction constant diameter of the annular collar this position the Clamping claws for the range of the axial length of the Ring collar independent of the axial position of the Clamping head makes.
Beim Spannen des Hohlschaftes ist es sehr wichtig, daß die Spannklauen zur Anlage an die Spannschrägen des Hohlschaftes gebracht werden können, daß also die Spannschrägen und die Schrägflächen eine Überlappung in axialer Richtung aufweisen mit einem ausreichend großen Fanghub. Um dies zu gewährleisten, ohne die Spannklauen selber axial verlängern zu müssen, weist die in der Arbeitsspindel zur Aufnahme des Klauenfußes ausgebildete Ringnut eine zum Klauenkopf geneigte Nutwand auf, durch die der Klauenkopf mit den Schrägflächen bei der Verstellung radial nach auswärts axial weiter nach vorne Richtung Hohlschaft reicht. Um dennoch eine sichere Lagerung der Spannklauen in der Arbeitsspindel zu erzielen, erstreckt sich die Nutwand bis zu ihrer halben Höhe rechtwinklig vom Nutgrund und weist auf der alten Höhe einen Neigungswinkel von 10° auf.When clamping the hollow shaft, it is very important that the Clamping jaws for contact with the chamfers of the Hohlschaftes can be brought, so that the Tension slopes and the inclined surfaces overlap in Have axial direction with a sufficiently large Fanghub. To ensure this, without the jaws To have to extend itself axially, has in the Work spindle for receiving the claw foot trained Ring groove on a claw head inclined groove wall, through the the claw head with the bevels at the Adjustment radially outward axially further forward Direction hollow shaft reaches. Nevertheless, a secure Storage of the jaws in the work spindle too achieve, the groove wall extends to its half Height at right angles to the bottom of the groove and points to the old one Height an inclination angle of 10 °.
Im folgenden wird die Erfindung an in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert; es zeigen:
- Fig. 1
- einen Längsschnitt durch das einen Hohlschaft haltende axiale Ende einer Spannvorrichtung; oben in der Spannstellung und unten in der Lösestellung gezeigt,
- Fig. 2
- eine perspektivische Darstellung des die Flügel aufweisenden Spannkopfes,
- Fig. 3
- einen Längsschnitt durch den Spannkopf aus
Figur 2, - Fig. 4
- eine Draufsicht auf den Spannkopf aus
Figur 2, - Fig. 5
- eine perspektivische Darstellung der zu einer Segmentspannzange zusammengefaßten Spannklauen,
- Fig. 6
- einen Längsschnitt durch die Segmentspannzange aus
Figur 5, - Fig. 7
- eine Draufsicht auf die Segmentspannzange aus
Figur 5, - Fig. 8
- eine Vorderansicht auf das freie Ende einer Spannvorrichtung mit den Spannklauen, die in der oberen Hälfte infolge der axialen Stellung des Spannkopfes in Eingriff mit den Spannschrägen des Hohlschaftes und in der unteren Hälfte außer Eingriff sind bei einer Ausführungsform mit insgesamt sieben Spannklauen und entsprechend sieben am Spannkopf ausgebildeten Flügeln, und
- Fig. 9
- eine der
Figur 8 entsprechende Darstellung einer Ausführungsform mit sechs Spannklauen und entsprechend sechs Flügeln.
- Fig. 1
- a longitudinal section through the hollow shaft holding axial end of a clamping device; shown above in the tensioning position and at the bottom in the release position,
- Fig. 2
- a perspective view of the wing having the clamping head,
- Fig. 3
- a longitudinal section through the clamping head of Figure 2,
- Fig. 4
- a top view of the clamping head of Figure 2,
- Fig. 5
- a perspective view of the combined to a segment collet jaws,
- Fig. 6
- a longitudinal section through the segment collet of Figure 5,
- Fig. 7
- a top view of the segment collet of Figure 5,
- Fig. 8
- a front view of the free end of a jig with the clamping jaws, which are disengaged in the upper half due to the axial position of the clamping head in engagement with the clamping chamfers of the hollow shaft and in the lower half in an embodiment with a total of seven clamping jaws and corresponding seven on the clamping head trained wings, and
- Fig. 9
- a representation corresponding to Figure 8 of an embodiment with six clamping jaws and corresponding six wings.
In Figur 1 ist eine Spannvorrichtung gezeigt zur lösbaren
Kupplung eines einen Hohlschaft 1 mit einer
Hohlschaftaufnahme 2 aufweisenden Werkstücks 3 mit der
Arbeitsspindel 4 einer Werkzeugmaschine. Zwischen dem
Hohlschaft 1 und der Arbeitsspindel 4 sind Planflächen 5
ausgebildet, und zwar radial gerichtete Planflächen 5
sowie aufgrund der Gestaltung des Hohlschaftes 1 als
Hohlschaftkegel geneigt zur Längsachse 6 verlaufende
Planflächen 5. Um den Hohlschaft 1 zum sicheren Spannen
gegen diese Planflächen 5 pressen zu können, sind in der
Hohlschaftaufnahme 2 geneigt verlaufende Spannschrägen 7
ausgebildet, an denen Spannklauen 8 mit korrespondierend
geneigten Schrägflächen 9 zur Anlage gebracht werden
können. Die Spannklauen 8 sind in einer in Umfangsrichtung
der Arbeitsspindel 4 verlaufenden Ringnut 10 gelagert und
erstrecken sich im wesentlichen in axialer Richtung
parallel zur Längsachse 6 der Spannvorrichtung, wobei die
Spannklauen 8 in die Ringnut 10 mit einem Klauenfuß 11
eingreifen und am entgegengesetzten freien Ende einen
Klauenkopf 12 aufweisen, an dem die Schrägflächen 9
ausgebildet sind. Zur Verstellung der Spannklauen 8 und
damit zur Betätigung der Spannvorrichtung ist in der
Arbeitsspindel 4 ein axial verschieblicher Spannkopf 13
geführt, der zur Ausbildung eines Keilgetriebes mit dem
Klauenkopf eine mit diesem zusammenwirkende Kegelfläche 14
aufweist sowie zum Lösen der Spannung eine an dem
Klauenfuß 11 angeordnete Stellfläche 15, an der ein
Ringbund 16 mit axial konstantem Durchmesser ausgebildet
ist, der mit einem am Klauenfuß 11 ausgebildeten Wulst 17
zusammenwirkt.In Figure 1, a clamping device is shown to be releasable
Coupling a
Zwischen der Kegelfläche 14 und der Stellfläche 15 des
Spannkopfes 13 sind zur Führung der Spannklauen 8 radial
abstehende Flügel 18 ausgebildet, deren Längenerstreckung
in axialer Richtung des Spannkopfes 13 sich radial von
innen nach außen vergrößert.Between the
Wie insbesondere aus Figur 5 ersichtlich ist, sind die
Spannklauen 8 an ihren Klauenfüßen 11 durch ein
Federglied 19 zu einer Segmentspannzange 20 verbunden,
wobei das Federglied 19 durch einen gummielastischen, an
die Klauenfüße 11 vulkanisierten Ring gebildet ist, der in
einer am Klauenfuß 11 in Umfangsrichtung verlaufenden
Nut 21 gehalten ist und sich in Umfangsrichtung in die
zwischen den Spannklauen 8 bestehenden Lücken 22 erstreckt
und mit den Radialflächen der Klauenfüße 11 verbunden
ist.As can be seen in particular from Figure 5, the
Die in der Arbeitsspindel 4 zur Aufnahme des
Klauenfußes 11 ausgebildete Ringnut 10 weist eine
Nutwand 23 auf, die sich bis zu ihrer halben Höhe vom
Nutgrund rechtwinklig erstreckt und ab dieser Höhe mit
einem Neigungswinkel von 10° zum Klauenkopf 12 neigt,
damit dieser zum Einsetzen des Hohlschaftes 1 einen
ausreichenden Fanghub aufweist.The in the
Die Spannvorrichtung kann prinzipiell mit einer beliebigen
geradzahligen oder ungeradzahligen Anzahl von
Spannklauen 8 realisiert werden. Als günstig haben sich
Ausführungsformen mit sechs oder sieben Spannklauen 8
herausgestellt, die in den Figuren 8 und 9 gezeigt sind.The clamping device can in principle with any
even or odd number of
Claims (8)
- A clamping device for releasably coupling a tool, workpiece (3) or the like which has a hollow shank (1) with a hollow shank receiving means (2), to the working spindle (4) of a machine tool, wherein the hollow shank (1) has clamping bevel surfaces (7) extending inclinedly in the hollow shank receiving means (2) and against which clamping claws (8) which are mounted on the working spindle (4) and which are actuable by an axially displaceable clamping head (13) guided in the working spindle (4) can be brought to bear with correspondingly inclined bevel faces (9) to produce a pressing force between the hollow shank (1) and the working spindle (4), characterised in that radially projecting fins (18) are provided on the clamping head (13) for guiding the clamping claws (8).
- A clamping device according to claim 1 characterised in that at the end which is remote from the claw head (12) having the bevel face (9) each clamping claw (8) has a claw foot (11) engaging into an annular groove (10) extending in the peripheral direction of the working spindle (4), that provided on the clamping head (13) to provide a wedge transmission arrangement is a taper surface (14) co-operating with the claw head (12) of each clamping claw (8) and to release the clamping action there is a control surface (15) associated with the claw foot (11), and that the fins (18) are disposed between the taper surface (14) and the control surface (15).
- A clamping device according to claim 1 or claim 2 characterised in that the longitudinal extent of the fins (18) increases radially outwardly in the axial direction of the clamping head (13).
- A clamping device according to one of claims 1 to 3 characterised in that the clamping claws (8) are connected at their claw feet (11) by a spring member (19) to form a segment clamping collet (20).
- A clamping device according to claim 4 characterised in that the spring member (19) is formed by a rubber-elastic ring which is held in a groove (21) extending in the peripheral direction on the claw foot (11), which engages in the peripheral direction into the gaps (22) between the clamping claws (8) and which is connected to the radial faces of the claw feet (11).
- A clamping device according to one of claims 2 to 5 characterised in that provided on the claw foot (11) is a ridge (17) facing towards the clamping head (13), for co-operating with an annular collar (15) at the control surface (15) of the clamping head (13) and of a constant diameter in the axial direction.
- A clamping device according to one of claims 2 to 6 characterised in that the annular groove (10) in the working spindle (4) for receiving the claw foot (11) has a groove wall (23) which is inclined relative to the claw head (12).
- A clamping device according to claim 7 characterised in that the groove wall (23) extends from the bottom of the groove at a right angle as far as half its height and from half its height is at an angle of inclination of 10°.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10040638 | 2000-08-17 | ||
| DE10040638A DE10040638A1 (en) | 2000-08-17 | 2000-08-17 | Clamping device for a hollow shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1184113A1 EP1184113A1 (en) | 2002-03-06 |
| EP1184113B1 true EP1184113B1 (en) | 2005-08-17 |
Family
ID=7653021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01112512A Expired - Lifetime EP1184113B1 (en) | 2000-08-17 | 2001-05-23 | Clamp apparatus for a hollow shank |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6568888B2 (en) |
| EP (1) | EP1184113B1 (en) |
| JP (1) | JP2002126918A (en) |
| KR (1) | KR100724221B1 (en) |
| AT (1) | ATE302083T1 (en) |
| CZ (1) | CZ297116B6 (en) |
| DE (2) | DE10040638A1 (en) |
| ES (1) | ES2244522T3 (en) |
| TW (1) | TWI220399B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589925C (en) * | 2008-05-23 | 2010-02-17 | 安东石油技术（集团）有限公司 | Jig for machining coupling excircle and uses thereof |
| CN101743085B (en) * | 2007-07-16 | 2012-02-08 | 罗姆股份有限公司 | Tensioning device for a hollow shaft |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10203667A1 (en) * | 2002-01-30 | 2003-07-31 | Roehm Gmbh | Clamping jaws for industrial drilling device, comprising cone-shaped extension accommodated in space provided at drive element |
| DE10338610B4 (en) * | 2003-08-22 | 2015-05-07 | MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG | interface |
| DE10342951B3 (en) * | 2003-09-17 | 2005-04-28 | Ott Jakob Spanntech Gmbh & Co | jig |
| DE102005041024A1 (en) * | 2005-08-23 | 2007-03-01 | Bielomatik Leuze Gmbh + Co.Kg | Apparatus and method for continuously producing a defect-free carrier web |
| DE102005048800A1 (en) | 2005-09-13 | 2007-03-22 | Röhm Gmbh | Method for operating an actuating unit and device for carrying out the method |
| DE102005049377A1 (en) * | 2005-09-13 | 2007-03-15 | Röhm Gmbh | Device for clamping a hollow shaft tapered workpiece or tool |
| US8684364B2 (en) * | 2007-01-12 | 2014-04-01 | Sil Han | Positive release collet |
| DE102007009578A1 (en) * | 2007-02-26 | 2008-08-28 | Röhm Gmbh | jig |
| DE102007016490B4 (en) * | 2007-04-05 | 2016-12-29 | Narr Beteiligungs Gmbh | handling device |
| DE102008022826A1 (en) * | 2008-05-07 | 2009-11-12 | Röhm Gmbh | clamping head |
| DE102010039096B4 (en) * | 2010-08-09 | 2014-05-15 | Mag Ias Gmbh | Tool spindle-tool combination for a machine tool |
| CN102950496B (en) * | 2011-08-17 | 2015-09-16 | 发得科技工业股份有限公司 | The tool-broaching mechanism of cutter |
| DE102012108066B4 (en) | 2012-08-30 | 2014-06-26 | Schenck Rotec Gmbh | jig |
| USD861054S1 (en) * | 2015-11-20 | 2019-09-24 | Downhole Technology, Llc | Fingered backup ring |
| CN106425623A (en) * | 2016-11-04 | 2017-02-22 | 广州市市政职业学校 | Clamping device for machining of hollow shaft with tapered hole |
| DE102019203888A1 (en) * | 2019-03-21 | 2020-09-24 | Gühring KG | Connection point between two tool system parts and the tool most equipped with it |
| DE102019127290A1 (en) * | 2019-10-10 | 2021-04-15 | Ott-Jakob Spanntechnik Gmbh | Jig |
| TWI724759B (en) * | 2020-01-17 | 2021-04-11 | 寅翊智造股份有限公司 | Gripper module |
| CN116638109B (en) * | 2023-07-26 | 2023-09-26 | 德力佳传动科技(江苏)股份有限公司 | Gear box turning device and turning method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4135848A (en) * | 1977-05-23 | 1979-01-23 | Kearney & Trecker Corporation | Toolholder clamp for machine tools |
| JPS62161906U (en) * | 1986-04-02 | 1987-10-15 | ||
| DE8703268U1 (en) * | 1987-03-04 | 1988-07-07 | A. Ott Gmbh, 8960 Kempten, De | |
| US4844671A (en) * | 1987-05-11 | 1989-07-04 | Gottlieb Guhring Kg | Coupling device |
| DE8816782U1 (en) * | 1987-05-11 | 1990-06-21 | Gottlieb Guehring Kg, 7470 Albstadt, De | |
| DE8805690U1 (en) * | 1988-04-29 | 1989-08-31 | A. Ott Gmbh, 8960 Kempten, De | |
| DE3939227A1 (en) * | 1989-04-05 | 1990-10-11 | Hertel Ag Werkzeuge Hartstoff | CLAMPING DEVICE FOR AXIAL CLAMPING OF A TOOL HEAD ON A MACHINE SPINDLE |
| DE59209205D1 (en) * | 1991-04-03 | 1998-04-02 | Mapal Fab Praezision | interface |
| DE4138974A1 (en) | 1991-11-27 | 1993-06-03 | Berg & Co Gmbh Spanntechnik | Clamping system for tools with hollow locating spigots - uses initial movement of drawbar to open claws so that clamping surfaces of tool and claws come into full contact before clamping force is exerted |
| JPH06312304A (en) * | 1993-04-28 | 1994-11-08 | Makita Corp | Chuck structure of power tool |
| JP3318732B2 (en) * | 1995-09-13 | 2002-08-26 | 株式会社日研工作所 | Spindle parts clamping device |
| DE19636594B4 (en) * | 1996-09-10 | 2005-03-10 | Roehm Gmbh | Release unit of a device for actuating a clamping head connected to a work spindle |
| SE512254C2 (en) * | 1997-01-17 | 2000-02-21 | Sandvik Ab | Tool Carriers |
| JPH10277862A (en) * | 1997-04-03 | 1998-10-20 | Sodick Co Ltd | Tool holder and tool holding device of metalcutting machine tool |
| US5851093A (en) * | 1997-08-07 | 1998-12-22 | Kennametal Inc. | Coupling system for machine tools |
| DE19908545A1 (en) * | 1999-02-27 | 2000-08-31 | Roehm Gmbh | Release unit of a device for actuating a clamping head |
| DE29922642U1 (en) * | 1999-12-24 | 2000-02-24 | Roehm Gmbh | Clamping device for a hollow shaft |
-
2000
- 2000-08-17 DE DE10040638A patent/DE10040638A1/en not_active Withdrawn
-
2001
- 2001-05-23 AT AT01112512T patent/ATE302083T1/en not_active IP Right Cessation
- 2001-05-23 DE DE50107101T patent/DE50107101D1/en not_active Expired - Lifetime
- 2001-05-23 EP EP01112512A patent/EP1184113B1/en not_active Expired - Lifetime
- 2001-05-23 ES ES01112512T patent/ES2244522T3/en not_active Expired - Lifetime
- 2001-07-06 KR KR1020010040194A patent/KR100724221B1/en not_active IP Right Cessation
- 2001-07-27 JP JP2001228358A patent/JP2002126918A/en active Pending
- 2001-08-10 TW TW090119658A patent/TWI220399B/en not_active IP Right Cessation
- 2001-08-14 CZ CZ20012944A patent/CZ297116B6/en not_active IP Right Cessation
- 2001-08-16 US US09/930,922 patent/US6568888B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101743085B (en) * | 2007-07-16 | 2012-02-08 | 罗姆股份有限公司 | Tensioning device for a hollow shaft |
| CN100589925C (en) * | 2008-05-23 | 2010-02-17 | 安东石油技术（集团）有限公司 | Jig for machining coupling excircle and uses thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50107101D1 (en) | 2005-09-22 |
| DE10040638A1 (en) | 2002-02-28 |
| TWI220399B (en) | 2004-08-21 |
| CZ297116B6 (en) | 2006-09-13 |
| CZ20012944A3 (en) | 2002-08-14 |
| KR20020020629A (en) | 2002-03-15 |
| EP1184113A1 (en) | 2002-03-06 |
| KR100724221B1 (en) | 2007-05-31 |
| US20020053770A1 (en) | 2002-05-09 |
| ES2244522T3 (en) | 2005-12-16 |
| US6568888B2 (en) | 2003-05-27 |
| JP2002126918A (en) | 2002-05-08 |
| ATE302083T1 (en) | 2005-09-15 |
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